All-digital impulse radio for MUI/ISI-resilient multiuser communications over frequency-selective multipath channels

Published 11 November 2002

Christophe J. Le Martret, Georgios B. Giannakis

DOI10.1109/milcom.2000.904010

Citations10

TL;DR

A novel continuous-time multiple input multiple output (MIMO) PPM-IRMA scheme is introduced, and its discrete-time equivalent model is derived.

Abstract

Impulse radio (IR) is an ultra-wideband system with attractive features for baseband asynchronous multiple access (MA), multimedia services, and tactical wireless communications. Implemented with analog components, the continuous-time IRMA model utilizes pulse-position modulation (PPM) and random time-hopping codes to alleviate multipath effects and suppress multiuser interference (MUI). We introduce a novel continuous-time multiple input multiple output (MIMO) PPM-IRMA scheme, and derive its discrete-time equivalent model. Relying on a time-division-duplex access protocol and orthogonal user codes, we design composite linear and non-linear receivers for the downlink. The linear step eliminates MUI deterministically and accounts for frequency-selective multipath, while a maximum likelihood (ML) receiver performs symbol detection.

Keywords

Engineering

Multiuser Detection

4,698 Citations1998Sergio Verdú

IEEE Communications LettersImpulse radio: how it works

2,198 Citations1998Moe Z. Win, R.A. Scholtz

The characteristics of impulse radio using a modulation format that can be supported by currently available impulse signal technology are described and analytical estimates of its multiple- access capability under ideal multiple-access channel conditions are given.

Multiple access with time-hopping impulse modulation

953 Citations2002R.A. Scholtz

An estimate of the multiple-access capability of a communication system employing a time-hopping modulation format employing impulse signal technology under ideal propagation conditions is presented, and emerging design issues are described.

IEEE Communications LettersOn the robustness of ultra-wide bandwidth signals in dense multipath environments

538 Citations1998Moe Z. Win, R.A. Scholtz

The results show that an ultra-wide bandwidth signal does not suffer multipath fading, and the robustness of the UWB signal in multipath is quantified through cumulative distribution functions of the signal quality in various locations of the building.

A novel impulse radio network for tactical military wireless communications

121 Citations2002S.S. Kolenchery, J.K. Townsend +1 more

A full-duplexing scheme which takes advantage of the low duty cycle nature of impulse radio to maintain physical layer links capable of supporting bi-directional data transfer is developed.

IEEE Transactions on CommunicationsAll-digital impulse radio with multiuser detection for wireless cellular systems

120 Citations2002Christophe J. Le Martret, Georgios B. Giannakis

A novel continuous-time impulse radio transmitter model is introduced and an approximate one with lower complexity is deduced, along with a time-division duplex access protocol along with orthogonal user codes to enable impulse radio as a radio link for wireless cellular systems.

All-digital PPM impulse radio for multiple-access through frequency-selective multipath

97 Citations2002Christophe J. Le Martret, Georgios B. Giannakis

A novel continuous-time PPM-IRMA model is introduced, a low-complexity approximate model is deduced, and its discrete-time equivalent model is derived.

An Impulse Radio Communications System

51 Citations1993Paul Withington, L. Fullerton

Pulson Communications has built a prototype impulse radio that appears to be adaptable for type acceptance under the rules of Part 15, and to be cost less than other sophisticated radio designs, especially spread spectrum systems.

IEEE Journal on Selected Areas in CommunicationsATM-based TH-SSMA network for multimedia PCS

50 Citations1999Moe Z. Win, Xiaoxin Qiu +2 more

To minimize the impact caused by user mobility on the system performance, a hierarchical network-control architecture is postulated and a wireless virtual circuit (WVC) concept is proposed to improve the transmission efficiency and simplify the network control in the wireless subsystem.

Signal selection for the indoor wireless impulse radio channel

37 Citations2002F. Ramírez-Mireles, Moe Z. Win +1 more

Communications using quaternary pulse position data modulation over the indoor impulse radio multiple access channel disturbed with multipath is investigated.